Packing device



Oct. 16

D. R. YARNALL PACKING DEVICE Fiied April 5, 1933 Patented Oct. 16, 1934 "UNITED sm 'rlzs muss [OFFICE PACKING DEVICE David RobertiYarnalL-Philadelphia, 1 a., assignr to Yarnall-War'ing Companmfhiladelphia, Pa. aoorporation of Pennsylvania s U V Application April 5, 1933,Serlal-No. 664,599

9 Claims. (01; 251-40 "My invention relates to packings, with pan ti'cular referenceto plunger valve packings which comprise packing rings surrounding the plunger element of the valve on one or other side of the -lateral port of the plunger according as'the valve is open orolosed, the lateral port of theplunger passing through the ring each time the valve is opened or closed.

p v p A purpose of my'invention is to provide a novel device-of the character indicated that is easy and inexpensive to manufacture andwell suited to the-needs of service.

A further purpose is to lessen any inward bulging'of a packing ring into the path of travel of a reciprocating member and particularly into the lateral port of avalve' plunger packed by the ringwhen'the plunger registers its port with the ring "interior.

A further purpose is to divide a column of "resilient packing, laterally exposed to a scraping action, into a plurality of shorter resiliently in terlocked columns end. to end. f

A further purpose is 'to intersperse, through-' out a column of"resilient packing, suitable supporting plates transverse to the exposed and ahra'dededge of the packing; allowing" tnepaeking to extend continuously through openings in thep'lates. K Furtherpurposes will appearin the specification and in the claims.

71' have elected to showone onlyof the different forms of my invention, selecting a form however that is practical and eflicient in operation and. well illustrates the principles involved. Figure. 1 is a sectional elevation through a seatpacking ring therefor, the valve being shown in open position. The illustrated device embodies a desirable form of inyinvention. Figure 2 is an enlarged fragment of Figure 1-. Flgure 3 is a view corresponding to Figure-,2, except that the parts are in different positions,

theiport of the plunger Valve being spaced frbm fragmentary sectional elevations respeetivay: or

59 a ring that may comprise that ofiFigures 2 to 4 and of aring of the prior art the views show ing the-ri'ngsbulging to exaggerated extentsi'nto theports of plunger valvespacked by therings; andlaeing intended to illustrate the greatly reduced inwardblflge of the applicants ring as and forced receding of the packing into andout compared with the inward bulge of a ring of the prior art, p

In'all figureslike numerals refer to like parts. Describing in illustration and not in limitation and referring to the drawing. 6 'In Figure 1 a valve plunger 10 having an end outlet at 11, and one or more lateral inlet ports at.12, is adapted to be moved longitudinal'ly'at' 13 by a hand wheel 13 through a screw 13 p'rot'ected by'a easing1'3 The valve plunger 10"lies within a laterally ported liner 14, fitting a counterbore l5fthat extends inwardly from oneend of the valve body 16. A plug 16 permits readyaocess into the valve interior;

The valve body has inlet and outlet' assages 7 at 17 and I8, which "are conneeted to adjoining piping byfl'ange's 17 18'. The valve plunger is packed, "on opposite ends of theliner 14, at 19 and 20, respectively above and below theinlet V passage 17 which registers with the lateral port '75 or ports 21 of the liner. I

The shell ring 22, packing ring 19, liner 14 and packing 20 arev compressed longitudinally to geth'eruponan inward flange 23 of the valve body'by thepull of yoke bolts 24, and the packing rings normally press outwardlyiagainst the iongltudinal' bore "of g the" b'od'y and inwardly against the plunger. Outward and inward ,bulg'ing of thepackings is normally prevented by the sealing engagements of the p'ackings on the outside with the body and on the inside withthe plunger.

Each ti'rne the valve is opened-or closed the plunger carries its port or ports 12" through the 7 lower packing 20 and, during its registry with the portor p'o'r ts 12,,th'e packing 20 bulges to a less blow-oii valve having a ported plunger anon greater or lesser extent'i'nto the port, being'iorced back outwardly again'as the port. is carried b'ey'ond theri'ng'. v

'In' practice this has hitherto resulted in relatively e'xcessive wear and. gradual deterioration oflfthe packing ring at the part thereof repeatedly passed by the port or ports 12, and an important object of the present invention is to eliminate or very) greatly reduce" the repeated inward bulging.

of the port, and therebyto' correspondingly elimi nate' orgreatlyreduce the wear and deterioration of the ring at the part thereof passed and re- 7 passed by the port.

In the prior art the packing has' bulged into. the-port as indicated exaggeratedly in Figure 6, the bulge 2'5 curving inwardly from opposite walls ofthe port and normally having its greatest inward extensibn at 26fat or near the middle of the In my ring any bulging is prevented at spaced intervals along its length, and thereby at spaced intervals across the port 12, as indicated in Figure 5, where the relatively long bulge 25 of Figure 6 has been replaced by a plurality of relatively short bulges 27, each of which has a very small inward extension as compared with that of Figure 6. I Y

The composite ring 20, of Figures 2 to 4, in-

lo cludes lamination rings alternately of molded packing and of metal, the metal laminations 28. having the same inner and outer diameters as the laminations 29 of molded packing and as the liner 14, to fit the outside of the plunger 10 and the inside of the counterbore 15 of the valve body. The metal laminations 28 are preferably flat and perforated at 30 at circularly spaced intervals, the molded packing filling theperforations and uniting the whole into a unit. The perfora-,

out of line as indicated in Figure 4. I

I find it'advantageous to make the laminations 28 of .a metal non-reactive with the high tendgg imetals, not only directly attacking therr'iet'al's' but also promoting deleterious electrolytic reactions between, for example, the adjacent surfaces of the plunger 10 and the rings 28, and between" the rings 28 and the ingredientsof the packing;

These reactions; while in themselves very small, may readily very seriously increasethe friction between the bearing surfaces of the] plunger and packing ring, and I have found that the reactions may be substantially eliminated-if m the ring laminations 28 are made of the metal known commercially as"stainless steel, and

preferably comprising of'chro'mium of nickel.

lower ends of the composite ring.

graphite and with rubberas a binder. The as bestos is a preferable base for'the packing, and other ingredients may, be added if de'sired'j The asbestos, by extending through the perforations,

if I I metallic lamination withthat on the other side.

The packing ring of my invention is builtup' by inserting metallic rings 28 between layers of packing 29, staggeringthe openings OrQpe'rfora- ..tions 30 of adjacent rings',va'nd applying pressure of the benefits of my invention without. copying fla the structure shown, and I,"th'erefore', 01mm; all

of contact at that point with said edge, and a packing in the space comprising a plurality of terialfint'o .the pathiof movement of the memunites the packing material on one side ofa such in so far as they fall within the reasonable spirit and scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the class described, walls forming a space adapted to hold packing, a member movable back and forth, alternately in contact at a given point with an edge of the'packii'ig and out 'ment of the member is reduced by the laminaticns.

2. In-a device of, the class described, walls formv ving a spaceadapted to hold packing, a member 249 tions in adjacent laminations 28 preferably are movable back and forth, alternately in contact at a given point with an edge of the packing and out of. contact semen point with said edge, and a packing in the space comprising aplurality of perforated metallic laminations generally transverse T to the path of movement of the member and packing material between the laminations and in the perforations, whereby bulging of the packing material into the path of movement of the member is reduced by the laminations. 3. In a device of the class described, walls forming a space adapted to hold packing, a member. movable back and forth, alternately in contact at a given point with an edge of thepackin g and out of contact at that point with said edge, and a packing in the space comprising a pluralityof 1m metallic laminations generally transverse. to the path of movement of the member and packing material between the laminations, having asbestosbase, whereby bulging of the packing mabar is'reduced by thejlaminations'. 4; In a device of the class described, walls forming a space .adaptedjt'o hold packing, a member Iprefer to provide the end laminations with; ammal truncated taper projections/"31', corre-f': spondingly recessing the liner 14 andflange 23 which respectively fit against the upper and movable back andfo'rth, alternately in contact at a given'pointj with an edge of the packing and out of contact atfthat point with said edge, anda packing, in the space comprising aplurality'of i i t perforated metallic laminations generally trans- The resilient packing may suitably contain as- 59 bestos formed into a ring, and mixed with.

verse to the path of movement of the member and packing material between the laminations'and in 5: the perforations having an asbestos base, whereby bulging of the packing'material into the path of movement of the member is reduced bythe laminations, and the packing is. united by the asbestos extending throughthe perforations.

5. In a device of the class described, walls forming a space adapted to hold packing, means for compressing packing in the space, a member m'ovable back and forth, alternatelyin contact at a given point-with anedge of the packing andout of contact at that point with said edge, and a packing in the spacecomprising a pluralityof metallic laminations generally transverse to the path ofmovementof the member and packing"- material between the laminations.

6. In a device of the class described, a packing .ring comprising a plurality of'parallel'metallic laminations and packing material having an sbestos base, between the laminations, means for holding and compressing the packing ring and a 14-5 member movable ina direction transverse to the,

laminations and in contact with the exposedannulansurface of the ringat least part of the time;

,7. In a device of the classdescribed, a packing 4 ring comprising a plurality; of perforated parallel-150..

metallic laminations and packing material having an asbestos base between the laminations and in the perforations, means for holding and compressing the packing ring and a'member movable 5,in a direction transverse to the laminations and in contact with the exposed annular surface of the ring at least part of the time.

8. In a plunger valve, a valve body having a lateral port, a longitudinally movable liner fitting 10 an intermediate portion of the body interior, a longitudinally movable hollow plunger having a laterally ported intermediate portion fitting inside and extending through the liner, an inward flange on the body longitudinally beyond the liner 1 and surrounding and fitting the outside of the plunger, said plunger having its hollow interior continuously communicating with the body interior at a portion thereof beyond the flange, and means for pressing the liner longitudinally toward the flange in combination with a composite packing ring compressed longitudinally between the liner and flange and radially between the outside of the plunger and inside of the body, said packing ring comprising a longitudinal succession of lamination rings alternately of molded packing and of metal, each approximately fitting the inside of the body and the outside of the plunger, the metal laminations having circularly spaced perforations through which the molded packing laminations unite with one another, and the plunger adapted to present its lateral port on one or the other side of the packing ring according as the valve is in its open or closed position.

9. In a plunger valve, a valve body having a lateral port, a longitudinally movable liner fitting an intermediate portion of the body interior, a longitudinally movable hollow plunger having a laterally ported intermediate portion fitting inside and extending through the liner, an inward flange on the body longitudinally beyond the liner and surrounding and fitting the outside of the plunger, said plunger having its hollow interior continuously communicating with the body interior at a portion thereof beyond the flange, and means for pressing the liner longitudinally toward the flange in combination with a composite packing ring compressed longitudinally between the liner and flange and radially between the outside of the plunger and inside of the body, said packing ring comprising a longitudinal succession of lamination rings alternately of molded packing and of metal, each approximately fitting the inside of the body and the outside of the plunger, and the plunger adapted to present its lateral port on one or the other side of the packing ring according as the valve is in its open or closed position.

DAVID ROBERT YARNALL. 

